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Proposal Identication No.: A1817 Date Received: 2003-Jun-02 10:03:09
Technical Page
Proposal Type: Regular
General Category: Astronomy
Sub-Category: Spectroscopy
Observation Category: Extragalactic
Total Time Requested: 32 Hours
Proposal Title: An HI search for LSB dwarf galaxies in the Millennium Galaxy Strip
ABSTRACT:
We found a total of 59 probable Low Surface Brightness (LSB) dwarf galaxies in the Millennium Galaxy Strip
when applying our Fourier deconvolution technique for the detection of LSB galaxies to the deep (average noise of
26 mag/ sq. arcsec) CCD images of this strip of 144 elds, which covers an area of 37.5 sq. degrees and passes
through regions of both high and low galactic density. Half of the probable LSB dwarf galaxies show structure,
indicating they are dwarf Irregulars or spirals and therefore expected to be gas-rich. Of the 14 for which we
recently could obtain short integrations at Arecibo, 5 were detected at redshifts between 1000 and 3600 km/s. We
wish to carry out HI observations of 49 of these 59 objects, excluding the 10 with optical redshifts above 11,000
km/s, in order to: determine their velocity distributions and HI masses and to look for environmental eects on the
gas content of the galaxies.
Name Institution E-mail Phone Student
Sarah Roberts Cardi University Sarah.Roberts@astro.cf.ac.uk +44 - 2920
876992
G
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
L-narrow
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
1365 - 1415
This proposal requires coordination with GPS L3 at 1381 MHz.
2